Pulley



July 1, 119%..

H. M. GUSDORF PULLEY Filed Feb. 12, 1923 Patented .Jluly l, llQZd.

HAROLD M. GUSDORF, OF INDIANAPOLIS, INDIANA.

PULLEY.

Application filed February 12, 1923.

To all whom it may concern:

Be it known that I, HAROLD M. GUsDoRr, a citizen of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented new and useful Improvements in Pulleys, of which the following is a specification.

The object of this invention is to provide a pulley with a belt surface pitted with elastic cup-like depressions that will give a vacuum-grip on the belt, and which will have a substantially inelastic side contacting the pulley-face to insure a stronger and more durable attachment to the pulley of the said outer material.

A. further object is to utilize hog-skin leather, tanned to preserve the desired inelastic grain surface and elastic flesh side with cup-formations natural to it for the pulley facing material.

I accomplish the above, and other minor objects such as will hereinafter appear, by the means diagrammatically illustrated in the accompanying drawing, in which- Fig. 1, is a cross section of hog-skin leather, greatly magnified, to show the interwoven fibres that impart a firm surface to the leather on the grain side, and the cup-like indentations of the other or flesh side. Fig. 2, is a side elevation of a pulley faced with hog-skin leather, and Fig. 3 is a front or face view of same.

Like characters of reference indicate like parts in the several views of the drawing.

The pulley 4: is of iron, steel, wood or other usual and suitable material made in the usual manner and of any desired size. The face 5 of the pulley is covered with Serial No. 618,484.

hog-skin leather with the 'firm inelastic grain or hair-side 6 in contact with the pul- 40 ley surface and the opposite flesh side 7 turned outwardly. This flesh side 7 is pitted with cup-like depressions 8, natural to hog: skin and carefully preserved in the process of tanning, and the adjacent material of the hog-skin to said cups is sufficiently elastie to allow them to be compressed under a load, thereby discharging much of their contained air, and to spring back due to said elasticity thereby creating partial vacuums which cause the pulley surface made from said leather to grip the belt.

The hog-skin leather will he cemented to the pulley face, or securely attached thereto in any suitable manner.

lVhile I have here illustrated and described hog-skin leather as a natural product when suitably treated in tanning, a pulley-facing material, having the same essential characteristics may be produced entirely by artificial means, and I do not desire therefore to limit my invention to hogskin or any certain material, more than is required by the appended claims.

I claim: a

'1. A surface cover for pulleys made out of hog-skin having the grain side next to the pulley and the flesh side out.

2. The combination, with a pulley, of a facingtherefor formed out of hog-skin leather having the grain side secured to the pulley and the flesh side out to be contacted by a belt. v

Signed at Indianapolis, Indiana, this the 6th day of February. 1923.

HAROLD M. GUSDORF. 

